Firms with < $.001 per 1000? Canadian?

I've been reading a lot about Canadian firms that are offering extremely low per share commissions for those scalping high volume stocks (BAC, etc). Since commissions really add up, I thought it was worth investigating further.

Can anyone recommend a firm that meets the following criteria?

1) Less than .001 per share (hopefully much lower).
2) supports automated traders.
3) Can co-locate (free or additional cost is fine)
4) Respectable firm that has been around for a while.
5) pass through rebates
6) Payout >= 85%

About us:

1) Located in the US
2) Series 7
3) Can put up $100k deposit in return for $2MM BP
4) Volume approaching 15 million per month.
5) Only trading high volume < $20 stocks. No overnight holds.

Any suggestions on who to approach would be helpful. Reply via PM if you'd like.